Good for the EFF. They've put some money behind an open-source project called Tor that might do a lot to stymy anti-P2P efforts. It's basically a SOCKS proxy -- install it on your computer (linux, windows, os x) and you'll join an ad-hoc P2P routing network. When you send a request from a given application -- your web browser, IM, BitTorrent, almost anything -- it'll be encrypted and sent through a random series of peers in the network to disguise where it's coming from. This isn't foolproof, for a number of reasons that are better explained by the project wiki, but it'll be fine for most uses.

However, Tor is also a potential liability: while the whole point of the system is that a user doesn't know what traffic is going through his system, that doesn't mean the law won't try to hold you responsible for it. Some Tor users have reported getting C&D letters for traffic that didn't belong to them. It seems unlikely that you could be held responsible for other people's traffic that gets routed through your system -- industry lawyers have tried this already, and the courts, realizing that it could mean the end of the internet, have arrived at an at least somewhat-agreeable detente with the ISPs. However, you probably don't want to be the first person to go through the process of confirming my hunch. So: caveat emp-Tor.